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Ca Tl VALVE FOR USE WITH CORROSIVE LIQUIDS. APPLICATION FILED MAR- lfi. 19H.

1 ,3 1 1 954. Patented Aug. 5, 1919.

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A 1A mm W%\ g ATTORNEY,

CHARLES '1. DALLY, OF WEST ORANGE, NEW JERSEY.

VALVE FOR USE WITH CORROSIVE LIQUIDS.

Specification of I .etters Patent.

Patented Aug. 5, 1919.

Application filed March 16, 1917. Serial No. 155,210.

To all whom it may conccrn:

Be it known that I, (.runmcs T. DALLY, a citizen of the United States, and a resident of West Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Valves for Use with Corrosive Liquids, of which the following is a full, clear, concise, and exact description, such as will enable others skilled in the art to which the invention relates to make and use the same, reference being made therein to the accompanying drawing, which forms a part of this specification.

My invention relates to valves of the type or class commonly referred to as reciprocating valves, because of the fact that they move bodily toward and away from their seats in controlling the flow of liquid past v the valve and valve'seat with which the valve cooperates; and relates particularly to valves desi ned to control the flow of corrosive liqulds, such, for example, as acids, which act chemically upon a valve and seat formed from the metals most commonly used in mechanical devices, thus injuring the same "and resulting in a leaky valve and one which wears out rapidly and has to be replaced frequently.

Heretofore the usual practice in providing a valve for controlling the flow of a corrosive liquid has been to make the valve and valve seat from lead, or .rather from lead containing a small portion of antimony, whereby a valve and seat is secured which will resist the corrosive action of most liquids. A' valve and seat formed from that material, however, are comparatively soft, and are rapidly worn out and rendered unserviceable because of the distortion which follows from the repeated a forcing of the valve onto its seat, and because of the erosive action of the liquid the flow of which the valve is designed to control, particularly if the liquid carries solid and hard particles with it. Furthermore, if solid matter'is carried along with the liquid, as is frequently the case, particles of the solid substance are liable to be caught between the valve and its seat and become embedded in one or the other, or to cause injury to the valve or seat, because of the soft and non-resistant character of the material from which they are made and the inability of the said material to withstand the action of hard and abrasive matter frequently encountered in the service for which the valve is designed.

The object of my invention is to provide a valve for the purpose stated in which the seating surface or valve proper is made of a yielding resilient material, such as rubber, whereby the contact between the valve and seat is cushioned and the seat. even though of soft material such as lead, will be subjected to a minimum of injury due to impact of the valve upon its seat. Such a valve, in addition, will adapt itself to inequalities of considerable magnitude in the valve seat, and still remain tight even though the seat ma be much worn; and, should hard partic es be caught between the valve and seat, the yielding character of the valve will prevent them from being forcedinto the material of the seat upon the closing of the valve. Also, the inherent resilience of the valve will, as the same is opened, tend to dislodge and throw off, as it were, such particles as may have been caught in the seating of the valve and temporarily forced thereinto, thus permitting the said particles to pass into and onward with the stream of li uid.

With the above an other objects of invention in view my invention consists in the improved valve and combination of valve and valve seat illustrated in the accompanying drawing, hereinafter described at length, and finally claimed in the concluding claims wherein the particular features wherein my invention consists are pointed out, and in such variations and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

Referring to the drawing wherein the preferred embodiment of my invention is illustrated:

Fi re 1 is a view showing a section of my lmproved' valve upon a longitudinal central plane;

Fig. 2 is a view showing a slightly modified form thereof; and

Fig. 3 is a view showin a section upon a liransverse plane indicated by the line 3-3.

Referring to the drawing, the reference numeral 4 designates a suitable valve stem shown as of a length sufficient to extend through a stuffing box or gland provided The valve 10 is held in placejagainsf th: .40

in the casing of any suitable form in which the valve and its seat, shown conventionally. at 5, are inclosed; and which stem 1s shown as provided with agrooved collar 6 at its outer end with which suitable means, not. shown, may be connected for moving the valve toward and from its seat, as is usual in reciprocating valves of the type to whlch my invention relates.

The valve stem illustrated comprises a central core 7 made from steelorequivalent material to give the valve the necessary strength, and which core extends longitude nall of the stem and is incased in a protertive non-corrodible sheathing 8 made of lead (or of lead containing a small quantity'of antimony, both of which, as. well also as equivalent materials, are contemplated whenever-the term lead is employed 111 this description. or in the cone uding' claims) tlie purpose. of which sheathing is to provideavalve stem which Wlll reslst the corrosive action of the liquid the flow of which is to be controlled by the valve. The valve stem may, however, be made entlrely of a material which will not be injured or corroded by the liquid in question, as will be a preeiated.

T e inner end of the valve stem is prefer ably enlarged to a shown at 9; in or er to provide a greater area of contact between the end of the stem .valve is likely to last, or the valve securing eater or less extent, as

and the soft and resilient valve 10 held in.

place against the end of the stem, and a better support for the valve; and the valve stem of the form of my Invention illustrated in. .Fig; 1 is provided with a tending passage 11;

inner end of the valve stem by meansofa:

ngitudinally --ex- I I Permittedv t pass into and alonglwith the r valve. securing member having an enla ged l v I made with a curved peripheral surface such pin or key 14. extending through-holesro-g 'videdfor it in the valve stem, andaadjacent head 12, and a reduced portion or. Stem 13 extending into thepaslsage- 11 in... the valve stem; and said securing member is secured to the valve stem by means of .a' transverse" in seat provides a structure in which the the inner end'ofthe reduced portion of the valve securing member, as illustratedxinyl Fig. 1 of the draw'in The eman te:

' tween the innerface' 0 the head 12 and the hole adjacent the end of the extending por-. tion 13 should be such that the valve. 10 will member may be replaced at slight expense when a new valve is secured to the valve stem, should such a course be deemed neces- ,75

sary or desirable. I have in-practice made the valve securing member from bronze with satisfactory resu The valve seat 5 will ordinarily be made from a material which will not be acted upon by the li uid flowing past the valve and seat, such, or example, as lead, and the yielding and resilient valve 10 is made from a non-metallic material softer than the. valve seat and one which will not be acted upon by the liquid, such, for example, as rubber; from which it follows that the seating of the valve will .be cushioned, and that the valvewill adapt. itself to inequalities in the seat and secure a tight closure even though 90,

the seat may be injured or worn to a considerable'extent. Furthermore, should particles of hard material be caught between the valve and seat as the valve is closed they will cause a displacement of the portion of the yielding valve adjacent and in immediate contact withthem, and will not be forced into or otherwise injure the harder but ,still' comparatively soft valve seat; and, as the valve is opened and moved from its seat, any hard particles caught between the valve and seat as'above will ordinarily be released and stream of liquid flowing past the valve and Y seat. The valve is illustrated as in the form (ii a frustum of a cone, although itmay .be

as-issecured'by the use of a valve of semi herieal or similar form; and the fact that t valve shown seats in a conical or tapervs vs is compressed in a radial or approxi' valve stem and the-inner surfaces of the head H 12mlwasher beneath the .nut 16;. whereby f be compressed somewhat, in bringing the j which it is held, and between the central 1 20 holes in the valve stem and in the extending portion into line with one another to permit the insertion of the key 14; whereby thevalve is held in a more or less compressed condition between the head 12 and the end of the valve stem and the entry of liquid.

into the joint between the valve and the end of the stem, and between the. valve and the member will be made from a material which the liquid is prevented from, entering. tween the valve and the members between tends beyond the inner end ofthe valve stem andthrough the valve,,and the valveis held inplacerelatively to the, inner endo'f the stem-by means of a suitable nut I'Ginthreaded on agement. with the extremity of the core. n this form of my invention the core is of uniform diameter throughout, while .in

the form shown in Fig. 1 the core is shown as provided with an enlargement at its inner en whereby the non-corrodible sheathing is more securely held in place upon the core. Either one of these details of construction may, however be used in either of the forms of my inventlon illustrated, as will be appreciated.

Having thus described and explained my invention, I claim and desire to secure by Letters Patent:

- portion of said stem and the head of said valve securing member, substantially as described.

2. A valve of the class described having a "suitable stem provided with an enlarged end, and a longitudinally extending passage; a valve securing member having a head, and a reduced-portion extending into a the assage aforesaid; a valve formed from suitable stem provided with a longitudina -yiel ing non-metallic material; and a key extending throu 11 holes rovided in said stem and the reduced portlon of said valve securing member, said key holding said valve in compressed condition between the enlarged end of said stem and the head of said valve securing member, substantially as described.

3. A valve of the class described having a suitable stem provided with an enlarged end, and a longitudinally extending pas-' sage; va, valve securing member havin a v a head, and ared'uced portion extending into the assalge aforesaid; a valve formed from yiel ing nonmetallic material; a kc extending through holes provided in sai stem and the reduced portion of said valve securing member; said key holdingsaid valvein compressed condition between the enlarged ve end of saidstem and the head of said va securing member, and a valve seat formed from non corrodible material and upon which said valve is adapted to, seat, substantially as described.

v4. A -valve of the class described having r extending passage, and which stem com- 'pri'ses a central, core incased in a protective non-corrodible sheathing; a valve securing member having a head, and a reduced portion extending into the assage aforesaid; a valve formed from ayie ding non-corrodible material; and a key extendin through holes provided in said stem and t e reduced portion of said valve securing member, said key holding said valve in. compressed condition between a portion of said stem and the head of said valve securing member, substantially as described.

5. A valve of the class described having a suitable stem provided with a longitudinally extending passage, and comprising a central core incased in a protective non-corrodible sheathing; a valve securing member having a head, and a reduced portion extending into the passage aforesaid; a valve formed from a ylelding non-corrodible material; a key extending through holes provided in said stem and the reduced portion of said valve securing member; said key holding said valve in compressed condition between a portion of said stem and the head of said valve securing member, and a valve seat formed from a non-corrodible material pressed condition between a portion of said stem and the head of said valve securing member, substantially as described.

7. In a device of the class described, a valve stem comprisin a core incased in a noncorrodible sheat ing, and a valve of yielding non metallic material removably secured to said stem and bearin directly against the ends of said core and s heathing, substantiall as described.

8. In a evice of the class described, a valve stem comprising a core having an enlarged end and incased in a non-corrodible sheathing, and a valve of yielding non-metalli'e material removably secured to said mm and bearing directly against the enlarged end of said core, substantially as described.

9. In a device of the class described, a valve stem comprisin a core incased in a non -cprrodible sheat ing, said core and sheathingbeing enlarged at one end, and a valve of yielding non-metallic material removably secured to said stem and bearing directly against the enlarged ends of said core and sheathing, substantially as described.

10. In a device of the class described, a valve stem comprising a core incased in a non-corrodible sheathing, and a valve of yielding non-metallic material removably attached to said core and bearing directly and rigidly attached to said core and bearagainst the end of said sheathing, snbstaning directly against the enlarged end of 10 tially as described. said sheathing. substantially as described.

11. In a device of the class described, 2L In testimony whereof I have signed my '5 valve stem comprising a core incased in a name to this specification this 13 day of non-corrodible sheathing, said sheathing \March, 1917. having an enlarged end, and a valve of yielding non-metallic material removably CHARLES T. DALLY. 

